Assembly block



FIG. 1 is a front, left side and top perspective view of an assembly block showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a perspective view of the assembly block illustrating an environmental assembly use thereof.

The broken line depictions of components, other than the assembly block, are illustrative of environmental structure used in conjunction with the embodiment and form no part of the claimed design.

A rear elevational view is a mirror image of the front elevational view.

A bottom plan view is identical to the top plan. 

The ornamental design for an assembly block, as shown and described. 